Ticking attrition caused by starvation, with each province having a limited degree of food supplies, and armies experiencing it outside of friendly territory, or when not able to loot enemies supplies (note: does not apply for great holy wars)

Rework of faction revolts - when revolting, the leader gets a temporary title equal in rank to his liege, with all other faction members becoming his vassals, rather than just allied to him.

A Special Troops unit slot, replacing horse archers. It handles all unique unit types in the base game, including horse archers, camel warriors and war elephants - but with considerable modding potential (musketeers, dragons, M1 Abrams ...). Multiple special units can be present in an army, although individual holding levies and retinues can only contain one.

"North Korea mode" nerf, with reduced amount of levies and income from holdings over the demesne limit.

Nestorian Christianity becomes an independent religious denomination rather than a heresy, and gets its own Holy Orders and holy sites. Socotra is ruled by an independent Nestorian in 867.

Revamped decadence system, based on a new decadent trait, and possibility to "straighten up" decadent relatives.

Close relatives asking and being refused a title might start an adventure against you (more frequent for Muslims)

Seljuk and Timur start as courtiers with special events to encourage their rise to power, rather than appearing as horde leaders. The Mongols function largely as before, although starting further east.

Rajas of India received generally positive reviews from critics. While they praised the new locations and religions, criticism was given towards the lack of any new features outside of the Indian region and the issues with rebel spam in India.